LM337L 100mA 可调输出负电压稳压器 | 德州仪器 TI.com.cn

LM337L (正在供货)

100mA 可调输出负电压稳压器

100mA 可调输出负电压稳压器 - LM337L
数据表
 

描述

The LM337L is an adjustable 3-pin negative voltage regulator capable of supplying 100 mA over a –1.2-V to –37-V output range. The LM337L is easy to use and requires only two external resistors to set the output voltage. Both line and load regulation are better than standard fixed regulators. The LM337L is packaged in a standard, easy-to-use TO-92 transistor package.

In addition to higher performance than fixed regulators, the LM337L offers full overload protection. Included on the chip are current limit, thermal overload protection, and safe area protection. All overload protection circuitry remains fully functional even if the adjustment pin is disconnected.

Normally, only a single 1-µF solid tantalum output capacitor is required unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is required. A larger output capacitor can be added to improve transient response. The adjustment pin can be bypassed to achieve very high ripple rejection ratios, which are difficult to achieve with standard 3-pin regulators.

Besides replacing fixed regulators, the LM337L is useful in a wide variety of other applications. Because the regulator is floating and monitors only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded.

The LM337L makes a simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM337L can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment pin to ground, which programs the output to 1.2 V, where most loads draw little current.

The LM337L is available in a standard TO-92 transistor package and a standard SO-8 surface mount package. The LM337L is rated for operation over a –25°C to 125°C range.

For applications requiring output current in excess of 0.5 A and 1.5 A, The LM137 series may be suitable. For the positive complement, the LM117 and LM317L series are options.

特性

  • Adjustable Output Down to 1.2 V
  • Ensured 100-mA Output Current
  • Line Regulation Typically 0.01%/V
  • Load Regulation Typically 0.1%
  • Current Limit Constant With Temperature
  • Eliminates the Need to Stock Many Voltages
  • Standard 3-Pin Transistor Package
  • 80-dB Ripple Rejection
  • Output is Short Circuit Protected

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参数 与其它产品相比 线性稳压器(LDO)

 
Output Options
Iout (Max) (A)
Vin (Max) (V)
Vin (Min) (V)
Vout (Max) (V)
Vout (Min) (V)
Fixed Output Options (V)
Package Group
Features
Regulated Outputs (#)
Operating Temperature Range (C)
Thermal Resistance θJA (°C/W)
Noise (uVrms)
Approx. Price (US$)
Rating
Output Capacitor Type
PSRR @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
LM337L LM120 LM137 LM337-N
Adjustable Output
Negative Output    
Fixed Output
Negative Output    
Adjustable Output
Negative Output    
Adjustable Output
Negative Output    
0.1     1.5     1.5     1.5    
-4.2     -7     -4.2     -4.2    
-40     -25     -40     -40    
-1.2     -5     -1.2     -1.2    
-37     -15     -37     -37    
  -5
-12
-15    
   
SOIC | 8
TO-92 | 3    
TO | 3     TO | 3     SOT-223 | 4
TO-220 | 3    
N/A     N/A     N/A     N/A    
1     1     1     1    
-25 to 100     -55 to 150     -55 to 150     -40 to 125
0 to 125
0 to125    
111     35     137     23    
38     150     1110     38    
0.26 | 1ku     9.80 | 1ku     9.27 | 1ku     0.61 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Non-Ceramic     Non-Ceramic     Non-Ceramic     Non-Ceramic    
  23     30     35    
1.4     2     4     2.4    
2200     3000     3000     2400    
0.05     1     0.065     0.065    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)    
3TO: 92 mm2: 9.14 x 10.03 (TO | 3)     3TO: 92 mm2: 9.14 x 10.03 (TO | 3)     4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)
See datasheet (TO-220)